Requirements and installation of high frequency annealing furnace

As we all know, good things must be equipped with a good placement space, so as to extend their service life. Of course, the high-frequency annealing furnace that currently sells well is no exception. A good placement space and installation method can greatly improve the efficiency of the high-frequency annealing furnace.

(1) Computer room. The high-frequency annealing furnace must have a separate machine room to prevent oil fumes and corrosive gases from other heat treatment equipment from affecting electrical equipment. The machine room should be well ventilated, and it is best to have an exhaust pipe above the quenching machine tool to discharge oil fumes and water vapor. The temperature of the computer room should be maintained at 15-25°C, the lighting should be sufficient, the room should be spacious and bright, and the power lines and lighting lines should be separated.

(2) Power supply. A separate power distribution cabinet should be set up to avoid normal operation due to tripping. A power filter should be connected in series between the three-phase power lines entering the room and the power distribution cabinet to prevent high-frequency electromagnetic waves from radiating along the power lines and causing interference to other electronic equipment.

(3) Grounding. Equipment, machine room shielding panels, water pipes, and power line iron pipes should all be reliably grounded. The grounding resistance of the equipment should not be greater than 4Ω, and the cross-sectional area of the grounding wire should not be less than 25mm2, or use a 2mmx25mm flat steel for grounding. It is not advisable to use a natural grounding body. An artificial grounding body should be used outdoors, that is, angle steel or round steel should be buried 2.5m underground. The grounding connection line should be in reliable contact with the machine body.

(4) Water supply. It is required that the water pressure can reach 0.12-0.2MPa, the water hardness is not greater than 0.017g/L, and the water resistance is not less than 4kΩ/cm3. In areas with poor water quality, internal circulation distilled water cooling devices should be used and regularly inspected and replaced. The cooling water pipe of the vacuum tube anode must have sufficient insulation length and insulation performance to prevent insulation breakdown.

(5) Installation program. Install each component in the specified position, connect the lines, and clean and remove dust from the entire equipment. According to regulations, install the vacuum tube on the anode water jacket. Do not invert the vacuum tube, damage it, or use metal tools to install it. Place a rubber ring between the vacuum tube and the water jacket, and then tighten the dish nut evenly by hand.

1) Use a 2500V insulation resistance meter to check that the anode-to-ground insulation resistance of the vacuum tube should be greater than 200MΩ (disconnect the voltage-reducing resistor of the anode voltmeter). If there is water in the anode water jacket, the insulation resistance is generally 50-100kΩ. The insulation resistance of the vacuum tube's grid to ground should be greater than 20MΩ.

2) Connect all cooling water lines, fill the can-shaped ceramic capacitors with transformer oil, and debug only after careful inspection.